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  <a href="http://sudopedia.enjoysudoku.com/X-Chain.html">Forcing X-Chain</a>
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   If {0} then we can prove through a Forcing X-Chain that {1}.<br/>
   Consequently <b>{2}</b>.<br/>
   Forcing Chain is the generic term for all types of chains and loops which propagate implications from one cell or candidate to another.<br/>
   This chain is an X-Chain because it involves a single candidate only.
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  <p>
   <b>Details of the Forcing Chain:</b><br/>
   {3}
  </p>
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